Ice-cream freezer.



Patented Jan. 2, I900.

1 R A H W ICE CREAM FREEZER.

(Application filsd 28, 1898.)

2 Sheets-Sheet I.

(No Model.)

No. 640,|95. Patented Jan. 2, I900.

' J. W. HART.

ICE cnEAm FREEZER.

(Application filed Mar. 28, 1898.)

(No Model.) 7 2 Sheets-Sheet 2.

gm B9 NlTED STATES PATENT OFFICE.

JOHN w. HART, OF IOLA, KANSAS, ASSIGNOR or ONE-HALF TO JOHN sPo'o ANDWILLIAM BRADLEY, 0F SAME PLACE.

ICE-CREAM FREEZER.

SPECIFICATION forming part of Letters Patent No. 640,195, dated January2, 1 906.

Application filed March 28,1898,

T0 whom it may concern:

Be it known that 1, JOHN W. 'HART, a citizen of the United States,residing at Iola, in the county of Allen and'State of Kansas, haveinvented a new and useful Ice-Cream Freezer, of which the following is aspecification.

This invention relates to apparatus for freezing milk, cream, custards,and like mixtures usually served in a frozen condition, and has for itsobject the provision of a machine which Will be practically continuousin operation, the mixture to be frozen being supplied at requiredintervals and the frozen delicacy removed as desired.

An essential feature of the invention is simplicity of construction anda disposition of the parts so as to economize in the refrigeratingagent, whereby a maximum amount of mixture 'can'be frozen with a givenquantity of refrigerant.

A further purpose of the improvement is the construction and assemblageof the parts to admit of access being readily had thereto for thepurpose of cleaning without loss of time or waste of material.

For a full understanding of the merits and advantages of the inventionreference is to be had to the accompanying drawings and the followingdescription.

The improvement is susceptible of various changes in the form,proportion, and the minor details of construction without departing fromthe principle or sacrificing any of the advantages thereof, and to afull disclosure of the invention an adaptation thereof is shown in theaccompanying drawings, in which Figure 1 is a perspective view of arefrigerating apparatus constructed in accordance with this invention.Fig. 2 isa Vertical central section thereof. Fig. 3 is a plan section ofthe apparatus about on the line X X of Fig. 2. Fig. 4. is a detail viewin perspective of the combined agitator and elevator. Fig. 5 is a viewof the agitator as seen from the inner end. Fig. 6 is a detail view ofthe combined scraper and deflector.

Corresponding and like parts are referred to.in the followingdescription and indicated in the several views of the drawings by thesame reference characters.

The receptacle or cabinet 1 for containing Serial No. 675,439. (Nomodel.)

the refrigerating agent may have any desired configuration, and, asillustrated, is of rectangular or box form and is lined with metal, soas to retain moisture and prevent the woodwork from injury. The cover isformed of similar parts 2, separable on a middle line and held togetherby hooks 3 and eyes 4 or like means. The cover is constructed so as tohave the portions fit within the upper part of the receptacle and a partoverlap the upper edges of the sides thereof and is held in place bysuitable fastenings, such as hooks 5 and eyes 6.

A vessel 7 ,of cylindrical form,is located centrally within thereceptacle 1 and has an opening in its side, near its upper end, for theescape of the frozen substance or mixture. compartment 8 is locatedopposite the side of the vessel, having an opening formed therein, andextends through a corresponding opening in the side of the receptacleadjacent to the side of the vessel having the opening formed therein.The walls of the compartment 8 surround the corresponding openingsformed in the sides of the receptacle and vessel and are of sheet metaland admit of the cold reaching the frozen substance contained in thecompartment and retaining it in a frozen condition until required to beserved. This compartment Sis closed at its outer end by a glass panel ordoor 9, which admits of the frozen substance being under observationwithout permitting the escape of the cold or the entrance of the heat tomelt the substance after it has been frozen. The lower edge of theopening in the side of the vessel 7 is higher than the bottom of thecompartment 8,anda lip or spout 10 projects outwardly therefrom andoverhangs the bottom of the compartment, so as to deliver the frozenmixture into a pan or box 11, placed in the com-' partment for itsreception.

The agitator consists of a cylindrical body 12, having its upper endportion made conical, as shown at 13. A tubular stem 14Qconnects withthe conical end 13 and passes through semicircular notches formed in themeeting edges of the parts 2. Suitable means are resorted to forrotating the stem 14 and the agitator connected therewith, and, asshown, a crank 15 is applied to the upper end of said stem.

of the stem 14C for this purpose. The vessel 7 is closed by a cover 16,which is centrally apertured for the passage therethrough of the stem14. An inner flange 17 is provided at the lower end of the cylindricalbody 12 to direct the substance or mixture to be frozen toward thecenter of the vessel 7. A flange 18 is arranged spirally around thecylindrical body 12 and extends from the lower to the up per end thereofand constitutes a screw elevator for lifting the substance to thecompartment 8 as quickly as it is frozen. This flange in addition toelevating the frozen substance serves to scrape it from the sides of thevessel 7. The upper end of the flange 18 terminates about in the planeof the lip or spout 10, so as to raise the frozen substance to the levelthereof.

A combined deflector and scraper 19 is mounted upon the lower portion ofthe tubular stem 14 and consists of a plate having its inner lower edgecut away at an angle corresponding to the inclination of the conical end13, against which the inclined edge of the plate bears, so as to removethe frozen substance therefrom when the machine is in operation. Thisdeflector is provided at its inner edge with hearings or rings 20,through which the tubular stem 14 passes loosely, thereby admitting ofthe agitator having an independent rotary movement. The lower outerportion 19 of the deflector overlaps and engages with the inner edge ofa side wall of the compartment 8, thereby directing the frozen substanceinto said compartment. A pin or stop 21 projects outwardly from thedeflector and engages with the side wall of the compartment 8 oppositesaid deflector and prevents the latter from following the rotarymovements of the agitator. The lower end portion of the deflector isadapted to clear the delivery end of the flange 18, thereby insuring aremoval of the frozen substance therefrom. A spring 22 is secured to theupper end of the deflector and is adapted to engage with the lower sideof the cover 16 and press the deflector against the conical end 13 ofthe agitator, so as to insure its efiective operation in removing thesubstance therefrom when frozen. A scraper 23, of ogee form, is appliedto the lower end of the cylindrical body 12, and its purpose is toscrape the substance from the bottom of the vessel 7 and move it outwardtoward the sides of said vessel, so as to be taken u p by the screwelevator.

In practice a refrigerating agent, such as a mixture of ice and salt, isplaced in the receptacle 1, around the sides of the vessel 7 and thewalls of the compartment 8. The milk, cream, or other liquid mixture tobe frozen is supplied to the vessel 7 in desired quantity through thetubular stem 14, preferaby by means of a funnel 24, fitted to the upperend The mixture entering the cylindrical bod y 12 passes upward into thespace formed between it and the sides of the vessel 7 and coming incontact with the cold sides of said vessel is congealed or frozen and iselevated by means of the spiral conveyor. The frozen substance when itreaches the deflector 19 is directed into the compartment 8 over the lipor spout 10 and is received in the pan or box 11, and the latter whenremoved is replaced by another pan, so that the apparatus may bepractically continuous in its operation, the mixture to be frozen andthe refrigerating agent being supplied from time to time as required.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is

1. In a refrigerating apparatus, the combination of an outer receptaclefor the freezing agent, a vessel fixed within the receptacle andsurrounded by such agent, a second rotary vessel within the first-namedvessel having a conical portion, a scraper mounted loosely upon thelast-named vessel and movable longitudinally thereof, and engaging afixed part to prevent its rotation, and a spring adapted to press thescraper longitudinally of said vessel and along its line of engagementand into contact with the conical portion, as and for the purpose setforth.

2. In a refrigerating apparatus, the combination with a receptacleadapted to receive a freezing mixture, a vessel fixed within thereceptacle, a second vessel within the firstnamed vessel and separatedtherefrom at its base and sides by interspaces, a spiral flangeintermediate the sides of the vessels and ex tending from the bottom ofthe first-named vessel upwardly thereof, a spring pressed scrapermounted loosely upon the inner Vesscl and movable longitudinally androtatably of the latter and adapted to engage the inner vessel, anopening in the base of the inner vessel, and means for contributing themate rial to be frozen directly to the inner vessel.

3. In a refrigerating apparatus, the combination with a vessel having anopening through a side, and a rotary agitator having a tapered portionadjacent said opening, of a spring-pressed combined deflector andscraper loosely journaled upon the agitator and movable longitudinallythereof and having a stop at its outer edge constantly engaging with aside of the opening of the vessel, substantially as and for the purposeset forth.

4. In a refrigerating apparatus, the combination with a vessel having anopening in its side, and an agitator, of a combined deflector andscraper loosely journaled upon the agitator and having its outer edgeportion engaging with a side of the opening of the vessel, and a springexerting a downward pressure upon the deflector to hold the same incontact with the agitator, substantially as set forth.

5. In a refrigerating apparatus, the combination with a vessel having aside opening, and an agitator comprising a cylindrical body having anupper conical end portion, of a combined deflector and scrapercomprising a plate loosely mounted upon the stem of the agitator andhaving its inner lower edge portion cut away to engage with the conicalend portion of the body and having its outer edge portion constructed toengage with a side of the opening of the vessel, substantially asdescribed.

6. A refrigerating apparatus comprising a receptacle for receiving thefreezing agent, a vessel located within the receptacle and having a sideopening, a compartment located in the space formed between the opposingsides of the receptacle and vessel, a door closing the outer end of thecompartment, a lip or spout overhanging the bottom part of thecompartment and in the plane of the lower edge of the opening formed inthe side of the vessel, a cylindrical body having its upper end madeconical and having a scraper at its lower end, and a spiral elevator atits outer side, a tubular stem connecting with the conical end of thebody and providing means for supplying the mixture to be frozen to thevessel, a combined deflector and scraper loosely mounted upon thetubular stem and adapted to engage with a side wall of the compartment,and a spring applied to the upper end portion of the deflector andadapted to engage with the cover of the vessel and exert a downwardpressure upon the deflector, substantially as and for the purpose setforth.

7. A refrigerating apparatus comprising an outer receptacle having anopening and adapted to receive the freezing agent, an inner cylindricalvessel having an opening communicating with the opening of thereceptacle, said vessel being adapted to receive the mix ture to befrozen, and a vertical hollow rotary agitator arranged concentric withinthe vessel, extending from the exterior of the apparatus to the saidvessel and forming a conduit to enable the mixture to be frozen to beintroduced into the device, said agitator being reduced at its upper andcylindric at its lower end, a spiral conveyor fast around the cylindricportion and adapted to scrape the frozen mixture from within the vesseland raise the same to the said openings, and a deflector opposite thereduced end of the agitator, engaging therewith, and directing thefrozen material into said openings, substan-- tially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

JOHN WQHART.

Witnesses:

A. 'H. CAMPBELL, PAUL GosHoRN.

